US5259587A - Roller clamp - Google Patents

Roller clamp Download PDF

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Publication number
US5259587A
US5259587A US07/895,041 US89504192A US5259587A US 5259587 A US5259587 A US 5259587A US 89504192 A US89504192 A US 89504192A US 5259587 A US5259587 A US 5259587A
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United States
Prior art keywords
rotary member
wheel
holder
tube
base wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/895,041
Inventor
Lawrence D'Alessio
Marvin Gordon
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Whitman Medical Corp
Original Assignee
Whitman Medical Corp
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Filing date
Publication date
Application filed by Whitman Medical Corp filed Critical Whitman Medical Corp
Priority to US07/895,041 priority Critical patent/US5259587A/en
Assigned to WHITMAN MEDICAL CORPORATION reassignment WHITMAN MEDICAL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: D'ALESSIO, LAWRENCE, GORDON, MARVIN
Application granted granted Critical
Publication of US5259587A publication Critical patent/US5259587A/en
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Expired - Fee Related legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • A61M39/285—Cam clamps, e.g. roller clamps with eccentric axis

Definitions

  • This invention relates to a roller clamp used to control liquid flow through a flexible tube.
  • the invention finds particular application in the medical field for controlling flow, for example, through I.V. tubing.
  • One common form of clamp comprises an elongate channel-like housing in which is mounted a wheel or roller on an inclined track which extends lengthwise of the channel.
  • the tubing is clamped between the wheel and the base of the channel, and the flow rate through the tubing is varied by moving the wheel along the inclined track so as to increase or decrease its distance from the base of the channel thereby adjusting the degree to which the wheel exerts pressure on the tubing.
  • Tubing clamps of the above kind may suffer certain disadvantages namely, because of the linear motion of the wheel along the channel to adjust the flow rate, there may not be a positive positioning of the wheel and should the clamp inadvertently be moved along the tube, the flow rate may be altered.
  • the present invention seeks to provide an improved tubing clamp generally of the above type.
  • Another object of the invention is to provide a tubing clamp in which the adjusted flow rate will not be altered even if the clamp is moved along the tube.
  • Still another object of the invention is to provide a tubing clamp which is economical to manufacture and which can be easily positioned on a tube and removed when required.
  • a three-piece roller clamp comprising a channel-shaped holder, a ratchet wheel with an integral eccentric hub, and a sleeve-like roller which fits on the hub, all of the components conveniently being plastic moldings.
  • the ratchet wheel and hub, with attached roller are adapted to snap into position between opposite walls of the holder for rotation about a fixed axis with no linear motion of the wheel and roller along the channel, and a tube to be clamped is positioned along the base of the holder under the roller.
  • the eccentric hub and roller change position relative to the tube so as to close or open the tube and control the flow of liquid through the tube without any linear movement of the wheel.
  • the base of the channel may be formed with a spring detent to engage the serrations of the ratchet wheel, so as to positively retain the wheel and hub in a selected position and allow the setting to be altered only by intent.
  • the roller moreover is preferably free to rotate on the eccentric hub, so that movement of the clamp along the tube is accommodated without altering the adjusted position of the ratchet wheel.
  • the outer surface of the roller may be bevelled and the base of the channel wherein it receives the tube may be correspondingly shaped so as to ensure that pressure is applied to the tube evenly over its entire cross-section to eliminate voids in the liquid flow and provide constant flow.
  • FIG. 1 is a perspective view of a roller clamp according to the invention
  • FIG. 2 is a sectional view on line 2--2 of FIG. 1,
  • FIG. 3 is a sectional view on line 3--3 of FIG. 1,
  • FIG. 4 is an end view of the roller clamp
  • FIG. 5 is a plan view of a holder element of the roller clamp.
  • the illustrated roller clamp 10 comprises a channel shaped holder 12, an element 14 formed by a serrated ratchet wheel 16 and an integral eccentric hub 18, and a sleeve-like roller 20 to fit on the hub. All of these items are conveniently plastic moldings.
  • Element 14 has a through-bore 22 concentric with ratchet wheel 16, and the hub 18 is eccentric relative to the through-bore.
  • the through-bore enables the element 14 to be rotatably mounted on stub-axles 24 on the opposite side walls of holder 12, the element snap fitting into place, with roller 20 being a loose fit on the hub.
  • Apertures 26 in the hub reduce its weight.
  • a space 28 is formed between the roller 20 and base wall 30 of the holder, for a flexible tube 32 to pass through, the height of such space being adjustable by virtue of the eccentricity of the hub 18 through rotation of wheel 16 so as to adjust the pressure on, and thereby the flow of liquid through tube 32.
  • the outer surface of roller 20 has a convex bevel and base wall 30 of the holder under the roller has a corresponding concave bevel so that the roller applies pressure evenly across the entire width of tube 32.
  • That part of the base wall 30 of the holder which is under the ratchet wheel has a U-shaped cut-out 34 forming a spring arm 36 with an upstanding detent 38 which engages the teeth of the ratchet wheel.
  • the ratchet wheel, eccentric hub and roller are positively held in position and the setting of the hub and roller is only altered by the intentional application of rotation to the ratchet wheel. Due to the loose fit of the roller on the hub, movement of the clamp along the tube can be accommodated without altering the adjustment setting of the clamp.
  • the holder has the customary flange 40 with a tube locating cut-out 42.

Abstract

A tube clamp particularly for adjusting liquid flow through tubes such as I.V. tubes has a channel-shaped holder along which the tube is passed and a rotary eccentric mounted in fixed position between opposite side walls of the holder for applying adjustable pressure on the tube dependent on the rotary position of the eccentric. A ratchet wheel with a spring detent is attached to the eccentric for rotating the eccentric and positively retaining it in a selected position of rotation.

Description

BACKGROUND OF THE INVENTION
This invention relates to a roller clamp used to control liquid flow through a flexible tube. The invention finds particular application in the medical field for controlling flow, for example, through I.V. tubing.
It is important accurately to control the flow of I.V. fluid to a patient and this is commonly achieved by means of an adjustable clamp on tubing which delivers the fluid to the patient from an I.V. bag or the like. In use, the clamp is opened or closed on the tube to control the rate of flow.
The prior art is replete with different designs of tube clamps for the above purpose. One common form of clamp comprises an elongate channel-like housing in which is mounted a wheel or roller on an inclined track which extends lengthwise of the channel. The tubing is clamped between the wheel and the base of the channel, and the flow rate through the tubing is varied by moving the wheel along the inclined track so as to increase or decrease its distance from the base of the channel thereby adjusting the degree to which the wheel exerts pressure on the tubing.
Tubing clamps of the above kind may suffer certain disadvantages namely, because of the linear motion of the wheel along the channel to adjust the flow rate, there may not be a positive positioning of the wheel and should the clamp inadvertently be moved along the tube, the flow rate may be altered.
The present invention, therefore, seeks to provide an improved tubing clamp generally of the above type.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a tubing clamp of the kind described comprising a channel-shaped holder and a clamping roller wherein the roller can be positively set in a desired position of adjustment relative to the tubing and only adjusted by intent.
Another object of the invention is to provide a tubing clamp in which the adjusted flow rate will not be altered even if the clamp is moved along the tube.
Still another object of the invention is to provide a tubing clamp which is economical to manufacture and which can be easily positioned on a tube and removed when required.
The above and other objects are achieved in a three-piece roller clamp according to the invention comprising a channel-shaped holder, a ratchet wheel with an integral eccentric hub, and a sleeve-like roller which fits on the hub, all of the components conveniently being plastic moldings.
The ratchet wheel and hub, with attached roller, are adapted to snap into position between opposite walls of the holder for rotation about a fixed axis with no linear motion of the wheel and roller along the channel, and a tube to be clamped is positioned along the base of the holder under the roller. As the ratchet wheel assembly is rotated, the eccentric hub and roller change position relative to the tube so as to close or open the tube and control the flow of liquid through the tube without any linear movement of the wheel.
Preferably, the base of the channel may be formed with a spring detent to engage the serrations of the ratchet wheel, so as to positively retain the wheel and hub in a selected position and allow the setting to be altered only by intent. The roller moreover is preferably free to rotate on the eccentric hub, so that movement of the clamp along the tube is accommodated without altering the adjusted position of the ratchet wheel.
The outer surface of the roller may be bevelled and the base of the channel wherein it receives the tube may be correspondingly shaped so as to ensure that pressure is applied to the tube evenly over its entire cross-section to eliminate voids in the liquid flow and provide constant flow.
The inventive clamp is conceived to be more positive and accurate in flow control than those in current use. Additional features and advantages of the invention will become apparent from the ensuing description and claims read in conjunction with the attached drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a roller clamp according to the invention,
FIG. 2 is a sectional view on line 2--2 of FIG. 1,
FIG. 3 is a sectional view on line 3--3 of FIG. 1,
FIG. 4 is an end view of the roller clamp, and
FIG. 5 is a plan view of a holder element of the roller clamp.
DESCRIPTION OF PREFERRED EMBODIMENT
The illustrated roller clamp 10 comprises a channel shaped holder 12, an element 14 formed by a serrated ratchet wheel 16 and an integral eccentric hub 18, and a sleeve-like roller 20 to fit on the hub. All of these items are conveniently plastic moldings.
Element 14 has a through-bore 22 concentric with ratchet wheel 16, and the hub 18 is eccentric relative to the through-bore. The through-bore enables the element 14 to be rotatably mounted on stub-axles 24 on the opposite side walls of holder 12, the element snap fitting into place, with roller 20 being a loose fit on the hub. Apertures 26 in the hub reduce its weight.
As best seen in FIG. 4, a space 28 is formed between the roller 20 and base wall 30 of the holder, for a flexible tube 32 to pass through, the height of such space being adjustable by virtue of the eccentricity of the hub 18 through rotation of wheel 16 so as to adjust the pressure on, and thereby the flow of liquid through tube 32. Also as best seen in FIG. 4, the outer surface of roller 20 has a convex bevel and base wall 30 of the holder under the roller has a corresponding concave bevel so that the roller applies pressure evenly across the entire width of tube 32.
That part of the base wall 30 of the holder which is under the ratchet wheel has a U-shaped cut-out 34 forming a spring arm 36 with an upstanding detent 38 which engages the teeth of the ratchet wheel. Thus, the ratchet wheel, eccentric hub and roller are positively held in position and the setting of the hub and roller is only altered by the intentional application of rotation to the ratchet wheel. Due to the loose fit of the roller on the hub, movement of the clamp along the tube can be accommodated without altering the adjustment setting of the clamp. At one end the holder has the customary flange 40 with a tube locating cut-out 42.
While only a preferred embodiment of the invention has been described herein in detail, the invention is not limited thereby and modifications can be made within the scope of the attached claims.

Claims (8)

We claim:
1. A tube clamp comprising a channel-shaped holder having a base wall and side walls, a rotary member, means mounting said rotary member for rotation about an axis extending between said side walls, said axis being fixed lengthwise of the holder, said rotary member having an outer periphery eccentrically disposed in relation to said axis for applying clamping pressure on a tube extending lengthwise along the base wall of the holder under the rotary member, said pressure being adjustable by rotation of the rotary member, and an operating wheel associated with the rotary member for manually rotating the rotary member, said wheel being positioned between said side walls adjacent the rotary member, said wheel having peripheral serrations and the holder having a spring detent engaging said serrations for positively retaining the wheel and the rotary member in a selected rotary position, said spring detent comprising a spring arm in the base wall of the holder with a detent at a free end of the arm.
2. A tube clamp as claimed in claim 1 wherein the arm is formed by a U-shaped cut-out in the base wall.
3. A tube clamp as claimed in claim 1 wherein the rotary member comprises a hub integral with said wheel and a sleeve-shaped roller positioned over the hub with a loose fit.
4. A tube clamp as claimed in claim 3 wherein the roller and the base wall of the holder have complimentary convex and concave cross-sectional profile portions for applying pressure substantially evenly across the width of the tube.
5. A tube clamp comprising a channel-shaped holder having a base wall and side walls, a rotary member, means mounting said rotary member for rotation about an axis extending between said side walls, said axis being fixed lengthwise of the holder, said rotary member having an outer periphery eccentrically disposed in relation to said axis for applying clamping pressure on a tube extending lengthwise along the base wall of the holder under the rotary member, said pressure being adjustable by rotation of the rotary member, and an operating wheel associated with the rotary member for manually rotating the rotary member, said wheel being positioned between said side walls adjacent the rotary member, said rotary member including an eccentric hub integral with the wheel, and further includes a sleeve-shaped roller fitted loosely over the hub.
6. A tube clamp as claimed in claim 5 wherein the wheel has peripheral serrations and the holder has a spring detent engaging said serrations for positively retaining the wheel and the rotary member in a selected rotary position.
7. A tube clamp as claimed in claim 5 wherein the wheel has peripheral serrations and the holder has a spring detent engaging said serrations for positively retaining the wheel and the rotary member in a selected rotary position.
8. A tube clamp as claimed in claim 5 wherein the wheel has peripheral serrations and the base wall of the holder includes a spring detent arm engaging the serrations and positively retaining the wheel and rotary member in a selected position of rotation.
US07/895,041 1992-06-08 1992-06-08 Roller clamp Expired - Fee Related US5259587A (en)

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Cited By (35)

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US5328487A (en) * 1992-09-23 1994-07-12 Jovanka Starchevich Intravenous tube mounting and control apparatus
US5429615A (en) * 1992-09-23 1995-07-04 Starchevich; Jovanka Intravenous flow regulating and mounting assembly
WO1996001592A1 (en) * 1994-07-11 1996-01-25 Karl Storz Gmbh & Co. Medical instrument with a manipulator
US5593392A (en) * 1992-09-23 1997-01-14 Starchevich; Jovanka Intravenous flow regulating and mounting assembly
US6117164A (en) 1997-06-06 2000-09-12 Dj Orthopedics, Llc Flexible multijoint therapeutic pads
US6533772B1 (en) * 2000-04-07 2003-03-18 Innex Corporation Guide wire torque device
US6536739B1 (en) * 2001-11-01 2003-03-25 Fresenius Usa, Inc. Flow control device
US20030071233A1 (en) * 2001-10-12 2003-04-17 Stewart Neil G. Fluid flow adjustment mechanism
US20030114802A1 (en) * 2001-12-13 2003-06-19 Chien-Wei Chung Flow regulator for IV tubing set
US6708944B2 (en) * 2002-01-09 2004-03-23 Delphi Technologies, Inc. Flow control system and valve for controlling a fluid flow
US20050015071A1 (en) * 2002-06-21 2005-01-20 Brimhall Greg L Method of and apparatus for controlling flashback in an introducer needle and catheter assembly
US6929235B1 (en) 2002-04-19 2005-08-16 Massachusetts Institute Of Technology Apparatus for flow rate control
US6929236B1 (en) * 2002-04-19 2005-08-16 Massachusetts Institute Of Technology Apparatus for flow rate control
US6935190B1 (en) 2002-04-23 2005-08-30 Massachusetts Institute Of Technology Flow rate measurement apparatus
USD608514S1 (en) 2007-05-03 2010-01-19 Johnsondiversey, Inc. Fluid reservoir
USD618411S1 (en) 2007-05-03 2010-06-22 Diversey, Inc. Grip for a floor maintenance tool
US20110196282A1 (en) * 2008-12-19 2011-08-11 Cvdevices, Llc (A California Limited Liability Company) Devices, systems, and methods for autoretroperfusion
US20120078232A1 (en) * 2009-04-24 2012-03-29 Imds R&D Bv Guidewire support system and guidewire
US20150190628A1 (en) * 2012-06-20 2015-07-09 Dong Kwan Kim IV Flow Controller Having Flushing Feature
US9120111B2 (en) 2012-02-24 2015-09-01 Rain Bird Corporation Arc adjustable rotary sprinkler having full-circle operation and automatic matched precipitation
US9156043B2 (en) 2012-07-13 2015-10-13 Rain Bird Corporation Arc adjustable rotary sprinkler with automatic matched precipitation
US20160067148A1 (en) * 2014-09-04 2016-03-10 Corpak Medsystems, Inc. Gastric systems, apparatus, and methods for use with enteral feeding
US9504781B2 (en) 2008-12-19 2016-11-29 Cvdevices, Llc Peripheral arterialization devices and methods of using the same
US9814864B2 (en) 2013-05-17 2017-11-14 Covidien Lp Torque apparatus for use with a guidewire
US9968727B2 (en) 2008-12-19 2018-05-15 Cvdevices, Llc Systems, devices, and methods for organ retroperfusion along with regional mild hypothermia
US10363354B2 (en) 2013-07-31 2019-07-30 Cvdevices, Llc Unitary body systems and devices and methods to use the same for retroperfusion
WO2020227597A1 (en) * 2019-05-09 2020-11-12 Bohnas Innovations LLC Dual lumen iv administration set
CN112424518A (en) * 2018-04-19 2021-02-26 Drm穆勒有限公司 Pipe clamping device
US11045300B2 (en) 2008-12-19 2021-06-29 Cvdevices, Llc Systems, devices, and methods for organ retroperfusion along with regional mild hypothermia
US20210259924A1 (en) * 2017-08-17 2021-08-26 Alcresta Therapeutics, Inc. Devices and methods for providing hydrolyzed lipids
WO2021245582A1 (en) * 2020-06-03 2021-12-09 Giorgio Mezzoli Flow regulator
US11401103B2 (en) 2015-08-28 2022-08-02 Poka Yoke, Inc. Dispenser apparatus and method of using same
WO2023285556A1 (en) * 2021-07-15 2023-01-19 B. Braun Melsungen Ag Infusion set having roller clamp
IT202100027221A1 (en) * 2021-10-22 2023-04-22 Borla Ind ROLLER CLAMP
US11872191B2 (en) 2012-02-17 2024-01-16 Alcresta Therapeutics, Inc. Methods, compositions, and devices for supplying dietary fatty acid needs

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US4285492A (en) * 1979-09-20 1981-08-25 Abbott Laboratories Flow control device
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